anyone growing....

[GBeck]

with hydroponics? not talking the funny smoke either. I was looking at starting something similar to a strawberry tower I saw. Looks easy enough to build, but was wondering how the roots got the water they needed. is it as simple as a constantly running filter pump from a bottom water reserve pumping it back to the top?
just looking into this for a project for the kids and I and the idea idea of fresh fruit and veggies year round is appealing